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Handling ``bad'' data

The way that you handle ``bad'' values in your data is similar to that used in Fortran, see here, however, the bad data values themselves are now defined in the img.h file and have names to reflect the C data types.
Bad value macro C data type
VAL__BADF float
VAL__BADD double
VAL__BADI int
VAL__BADS short
VAL__BADUS unsigned short
VAL__BADB signed char
VAL__BADUB unsigned char



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IMG Simple Image Data Access
Starlink User Note 160
P.W. Draper
R.F. Warren-Smith
3 March 2003
E-mail:P.W.Draper@durham.ac.uk

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